Christians tend to get tongue-tied when they are telling others about Jesus and it does happen to pastors as well. When Paul and Silas when to the Berean Jews, they accepted the gospel with gladness:
10That very night the believers sent Paul and Silas to Berea. When they arrived there, they went to the Jewish synagogue. 11And the people of Berea were more open-minded than those in Thessalonica, and they listened eagerly to Paul’s message. They searched the Scriptures day after day to see if Paul and Silas were teaching the truth. 12As a result, many Jews believed, as did many of the prominent Greek women and men. (Acts 17: 10-12)
The way that they accepted and searched the Scriptures is exactly the way that we should be every day with the Word of God. The more frequently you read and study the Bible, more of it will get into your mind and you won’t have to memorize it. It will just be there waiting to be used. It will also give you a greater understanding of God and His ways to “search the scriptures” because in doing so, you will be learning about God more and more.
Should we be more forceful or pushy with our faith, trying to convert anyone that we can? Absolutely not! Yes, we need to be able to tell others and defend the reason for our faith in what we believe and Who we believe in, but being zealous for our faith to the extreme is not necessary. Jesus wasn’t that way and we don’t need to be either. All that we need to do is tell others about why we believe in Jesus and why, the Holy Spirit will take that seed and make it grow.
God’s Word doesn’t come back to Him void of the purpose for which it was sent out. It always accomplishes that which He wills for it to do. Can we be better witnesses? Yes, with the help of Jesus and the Spirit of Truth. Why can’t we do it on our own strength? Because doing it on your own is not the way that it is done! If that were the case, Jesus wouldn’t have needed to come and die on the cross. In our own strength, we could keep the Law and work our way toward salvation, but we can’t!
We are too weak to be able to resist the temptations of daily living without the Holy Spirit in our lives and Jesus’ righteousness is the Only righteousness that is able to cover our sins. God loves us enough to know all of these things about us, yet He still sent His Son to die for us so that we will be able to come into His presence.
I am not saying that people can’t be morally good and do some worthy and good things even without knowing Jesus because they can. It is because of the Law that God wrote into our being that we know right from wrong and also we learned it from our parents and grandparents. So, yes, even people who believe in other gods or no god at all can do good things…morally right things even. The problem comes when you think that your “good works” are good enough to cover your sins and get you into Heaven, because they are not.
God is perfectly Holy and since He is, do you think that you can just walk up to His house and let yourself in? Do you think that you could do this at any residence of someone that you don’t even know? Of course you couldn’t and you wouldn’t let anyone into your house either if you did not know them. That is only a tiny part of why God can’t and won’t allow you to “work” your way into Heaven. He has given it to you as a gift and it is available to everyone in the same way, all that you need to do is accept it and believe it. That is it.